TRAK-DTT ( Item #565)
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Track Detector with Adjustable Timer
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Add a station stop easily with the TRAK-DTT or use the TRAK-DTT as a "short block" detector with fixed timed occupancy. Simply create an isolated section of track to trigger the TRAK-DTT, change a few wires, and you have it. Use the TRAK-DTT to operate your solenoid type switches or semaphores. You can also use the TRAKDTT as a momentary power supply for all your solenoid switch machines on your layout. The TRAKDTT combines two functions in one unit. There is a jumper selector located on the small circuit board which also contains the time frame adjustment potentiometer. With the jumper selector removed the device becomes a timer where, when current flow is sensed, the relay activates for a time frame and then relaxes. Interrupting current flow for a few seconds resets the time circuit. With the jumper selector installed, the device functions as an adjustable detector where the relay is activated for the duration of current flow, PLUS an adjustable time period. |
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The TRAKDTT is a variation of current detection that provides for event timing. The TRAKDTT has two modes of operation:
1-used as a TIMER. When current flow is sensed in the detection coil, the relay is activated for a time period (user adjustable) and then relaxes for the duration of current flow. Once current flow has ceased for a few seconds the time circuit resets and can then be reactivated. 2-used as a DETECTOR TIME ADJUSTABLE. As with the TRAKDT, when current flow is sensed in the detection coil, the relay is activated. However, with the TRAKDTT in this mode, the relay is held activated for an adjustable time period after current ceases to flow. In other words the TRAKDTT activates for the duration of current flow PLUS the adjustable time period. The time period of the TRAK-DTT is adjustable from a momentary relay activation as minimum to a maximum of approximately 75 seconds. The momentary function is very useful in operating solenoid type switch machines or semaphores. In order for the electronics to function properly it is essential that a "regulated" power supply of 12 VDC be employed. This 12 VDC power is only for the electronics and has absolutely nothing to do with track power. Failure to use a "regulated" 12 VDC can cause erratic functioning or actual destruction of the TRAK-DTT. For proper power supply refer to the 12VPS (Item 369). |
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| Relay Contacts electrical diagram | |
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Relay contacts are used on most all of our Signaling Components. These are used since they are the most forgiving when mis-wiring occurs and they provide for electrical isolation of the load to the circuit.
When the relay is relaxed the "C" Common terminal is connected to the "N/C" Normally Closed. When the relay is activated the "C" Common terminal is then connected to the "N/O" Normally Open terminal. The relays used on our circuitry contain Double contact sets indicated by section A and section B. Remember a relay is nothing more than an electrically activated switch! |